Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Me diga o construtor para alberto colombo e chassi de a1
 ###Tabelas: CREATE TABLE tally (tally_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Matches INT, Wins INT, Draws INT, Losses INT, Record (%) [draw = 0.5 wins] INT) CREATE TABLE 2012_calendar_year_ratios_of_crime_per_100000_population (2012_calendar_year_ratios_of_crime_per_100000_population_id AUTO_INCREMENT PRIMARY KEY, State VARCHAR, City VARCHAR, Population INT, Violent Crime VARCHAR, Murder and Non-Negligent Manslaughter INT, Forcible Rape VARCHAR, Robbery INT, Aggravated Assault INT, Property Crime VARCHAR, Burglary INT, Larceny-Theft VARCHAR, Motor Vehicle Theft INT) CREATE TABLE major_tournaments (major_tournaments_id AUTO_INCREMENT PRIMARY KEY, Year INT, Tournament VARCHAR, Venue VARCHAR, Discipline VARCHAR, Result VARCHAR, Extra VARCHAR) CREATE TABLE junior_classic_race (junior_classic_race_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Rider VARCHAR, Team VARCHAR, Speed VARCHAR, Time VARCHAR) CREATE TABLE drivers_and_constructors (drivers_and_constructors_id AUTO_INCREMENT PRIMARY KEY, Entrant VARCHAR, Constructor VARCHAR, Chassis VARCHAR, Engine VARCHAR, Tyres VARCHAR, Driver VARCHAR, Rounds VARCHAR)  
SELECT Constructor FROM drivers_and_constructors WHERE Driver = alberto colombo AND Chassis = a1